Spectrally resolved detection in transient-reflectivity measurements of coherent optical phonons in diamond

Abstract

Coherent optical phonons in bulk solid system play a crucial role in understanding and designing light-matter interactions and can be detected by the transient-reflectivity measurement. In this paper, we demonstrate spectrally resolved detection of coherent optical phonons in diamond from ultrashort infrared pump-probe measurements using optical band-pass filters. We show that this enhances the sensitivity approximately 35 times in measuring the coherent oscillations in the transient reflectivity compared with the commonly used spectrally integrated measurement. To explain this observation, we discuss its mechanism.

arXiv comment8 pages, 4 figures

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• Ultrafast Quantum-path Interferometry Revealing the Generation Process of Coherent Phonons
• Coherent control of 40-THz optical phonons in diamond using femtosecond optical pulses
• Two-step dynamics of photoinduced phonon entanglement generation between remote electron-phonon systems
• Modulation of probe signal in coherent phonon detection revisited: Analytical and first-principles computational analyses
• Time-resolved multimode heterodyne detection for dissecting coherent states of matter
• Interplay of electron-phonon nonadiabaticity and Raman scattering in the wavepacket dynamics of electron-phonon-photon systems
• Phonon dynamics of a bulk WSe${}_2$ crystal excited by ultrashort near-infrared pulses